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Finding the Fourth Proportional to 643.60, 964.82 and 232.45

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Solution

The fourth proportional to 643.60, 964.82 and 232.45 is: 348.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.60 : 964.82 = 232.45 : x
  2. Step 2: Convert to fraction form
    643.60/964.82 = 232.45/x
  3. Step 3: Cross multiply
    643.60x = 964.82 × 232.45
  4. Step 4: Simplify right side
    643.60x = 224,272.41
  5. Step 5: Solve for x
    x = 224,272.41/643.60
  6. Step 6: Final answer
    x = 348.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.